CN108367380A - Steel workpiece with improved surface quality - Google Patents
Steel workpiece with improved surface quality Download PDFInfo
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- CN108367380A CN108367380A CN201580083609.2A CN201580083609A CN108367380A CN 108367380 A CN108367380 A CN 108367380A CN 201580083609 A CN201580083609 A CN 201580083609A CN 108367380 A CN108367380 A CN 108367380A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/227—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded with ferrous layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention particularly relates to a kind of steel workpiece (1), with fringe region (2) and nucleus (3).The purpose of the present invention is to provide a kind of steel workpiece (1), it has reached as high as possible near surface intensity and still advantageous surface characteristic, especially there is in hot rolling advantageous oxidation behavior, the purpose forms softer than in nucleus (3) by making in steel workpiece (1) edge region (2), and pass through the alloy compositions C for making generally steel workpiece (1), Si, the summation of Mn, Cr and N are solved more than 1.45 weight %.
Description
Technical field
The present invention relates to a kind of steel workpieces, with fringe region and nucleus.In addition the invention further relates to bases
The application of the steel workpiece of the present invention and a kind of vehicle chassis component, especially wheel, wheel stand, wheel bearing, wheel suspension, beam,
Axis, guide arm or part of it.
Background technology
Continue new for reducing oil consumption or to improve conception and the solution party of course continuation mileage finding in the automotive industry
Case.Here, light weight construction is considered as an important factor for reducing vehicle weight and thus reduce oil consumption and improve course continuation mileage.Material
Material, which is saved, to be reached by using with the material for improving intensity.
Light weight construction is especially important for vehicle chassis component, and vehicle chassis component is the part without the vehicle mass of damping.This
A little components are but subjected to the alternate stress of surging swing in operation, thus at the same time it is wished that these components have high fatigue strong
Degree.
The possible conception that different characteristics are unified in a component is to use composite material by one.By the prior art
In, such as there are three the multilayers of layer to answer by for example known tool using the production of rolling covering in 10 2,008 022 709 A1 of DE
The application of condensation material.It is required necessary to the field of chassis to meet, particularly with the requirement of high operation intensity, it is proposed that setting
Outer layer is made of plastic steel alloy FB-W 600 and middle layer is made of FeMn steel, and wherein outer layer accounts for overall thickness respectively
30%.
However there are this problems, i.e., the micro alloyed steel being widely used from chassis field, intensity carries
Height can cause the processing of steel to become negatively affected.For example, the oxidation behavior of material can so change so that in hot rolling for example by
Occur to hot-rolled band surface quality detrimental effect in scale mark.
But studies have shown that the high intensity and quality on material surface are especially important.Especially occur under running conditions
In the application of the load of fluctuation, the defects of material surface can lead to premature failure.For this reason, in this component
To propose very high requirement using the surface quality of material.
Invention content
In this context, the purpose of the present invention is to provide a kind of workpiece, a kind of application and a kind of chassis component can be with
Reach as high as possible near surface intensity but still can reach advantageous surface characteristic, the especially advantageous oxidation in hot rolling
Behavior.
The purpose solves in this way in this steel workpiece, i.e., so that the workpiece formed in its fringe region ratio in core
It is softer and the summation of alloy compositions C, Si, Mn, Cr and N of the steel workpiece is made to be generally larger than 1.45 weights in heart district domain
Measure %.
Alloy compositions C, Si, Mn, Cr and N are improved steel alloy the influence of intensity.It can be seen that when setting the combination
When gold group subtotaling is more than 1.45 weight %, near surface intensity necessary to can reaching in nucleus, but even now
It is still able to that sufficiently soft fringe region is arranged, to reach the surface quality of steel workpiece improvement.Generally steel workpiece
The summation of alloy compositions mean comprehensively or macroscopic view fifty-fifty treat it is entire including nucleus and fringe region
Concentration in steel workpiece.Locally or it is microcosmic from the point of view of, it is particularly possible to be set lower than 1.45 weight %'s in the edge region
These improve the concentration of the alloying element of intensity and are set higher than the concentration of 1.45 weight % in nucleus.It is generally or macro
The concentration is but higher than 1.45 weight % from the point of view of seeing.
By the way that the steel are divided into harder nucleus and fringe region combination alloy compositions soft in contrast
Thus the relatively high minimum concentration of C, Si, Mn, Cr and N can avoid workpiece or strong by the too small fatigue of the component of its production
Degree, and however still can ensure the advantageous surface characteristic in relation to oxidation behavior in hot rolling.
Here, can especially true setting fringe region so that the characteristic of the component produced by the steel workpiece essentially by
Nucleus determines.It is opposite with conception in the prior art, it can be seen that fringe region need not be set as being bound to later
The functional layer that exerts a decisive influence of component.But it can so design fringe region so that although its characteristic is manufacturing
It is advantageous in (such as hot rolling), but then there is no any effects substantially in the component produced by the steel workpiece.This example
Can such as be reached by the small thickness of geometry, especially fringe region, as a result, after component characteristic substantially by core
Central layer determines.
The steel workpiece formed in the edge region the meaning softer than in nucleus especially, the steel workpiece is on side
Have than fracture elongation higher in nucleus, smaller tensile strength and/or smaller yield limit in edge region.
Fringe region especially can be considered the surface region of steel workpiece.Fringe region thus constitutes the soft of steel workpiece
Coating.
The steel workpiece especially can be semi-finished product, blank, flat product, such as steel plate either steel band or can also
It is component.
In principle it is possible that the steel workpiece is in addition also on upper or two sides on one side all with organic or inorganic
Coating, the coating are extraly applied on soft fringe region.
According to meet the present invention steel workpiece a design scheme, the alloy compositions C, Si, Mn, Cr of steel workpiece and
The summation of N is generally especially less than 4.5 weight %, and preferably smaller than 4.0 weight %, particularly preferably less than 3.5 weight % are special
It is advantageous.Although the alloy compositions of intensity can be increased by raising to reach for the advantageous strength enhancing of fatigue strength.But
Alloy compositions by the way that steel workpiece to be increased to intensity are particularly preferably limited to less than 3.5 weight % and avoid mistake in fringe region
High intensity simultaneously thus avoids such as deterioration of the surface quality caused by scale mark during manufacturing.
In terms of one side high intensity and surface quality high simultaneously, here it is particularly advantageous that the weight of steel workpiece
It is as follows to measure the generally limitation of one or more of following alloy compositions that % is unit：
0.05≤C≤0.5；
0.06≤Si≤1.5；
0.5≤Mn≤3.0；
P≤0.03；
S≤0.03；
Al≤2.0；
Cr≤1.5；
Cu≤0.5；
Mo≤0.5；
N≤0.01；
Ni≤0.5；
Nb≤0.2；
Ti≤0.5；
V≤0.1；
B≤0.1；
As≤0.01；
Sn≤0.05；
C≤0.02
Ca≤0.01。
As previously mentioned, steel workpiece can locally have higher or lower concentration in the different areas.It is conclusive
Be about the steel workpiece each condition limitation generally met.
According to another the preferred design scheme for the steel workpiece for meeting the present invention, alloy compositions C, Si, Mn, Cr and N
Summation in the edge region is especially greater than 0.01 weight %, preferably greater than 0.05 weight %, especially preferred more than 0.1 weight %
And/or it is less than 1.35 weight %.Minimum by enhancing the alloy compositions summation in the edge region of intensity avoids entirely
The overgenerous reduction of steel workpiece intensity, and the maximum level for enhancing the alloy compositions summation of intensity by limitation avoids side
Excessively high intensity in edge region, it is possible thereby to provide sufficiently soft coating during fabrication.
According to another the preferred design scheme for the steel workpiece for meeting the present invention, alloy compositions C, Si, Mn, Cr and N
Summation in nucleus is more than 1.7 weight % and/or especially less than 4.8 weight %, preferably smaller than 4.3 weight %, especially
Preferably smaller than 3.8 weight %.Can totally it be reached by enhancing summation minimum of the alloy compositions of intensity in nucleus
The sufficiently high intensity of steel workpiece, thus the steel workpiece be particularly suitable for being subjected to the component of alternate stress.It can pass through simultaneously
Summation of the alloy compositions of limitation enhancing intensity in nucleus avoids the positive qualities of soft fringe region due to excessively high
Near surface intensity and be damaged.
According to another the preferred design scheme for the steel workpiece for meeting the present invention, the fringe region of the steel workpiece by
The marginal layer being arranged on nucleus two sides is constituted.It can be reached by the way that the fringe region for being formed softer is arranged on two sides
By the extra high fatigue strength for the component that the steel workpiece produces, this is especially required in vehicle chassis component, because making
When making, high surface quality can all be obtained on two sides by coating all soft on two sides.
In principle it is possible that the fringe region being arranged on two sides is formed as different.But according to meeting the present invention
Steel workpiece another design scheme, when the marginal layer that will be arranged on core layer two sides is in its thickness and/or composition side
It is advantageous when face is configured to almost the same.On the one hand the symmetric construction of steel workpiece promotes the characteristic of steel workpiece more uniform
And on the other hand so that production process is simpler.
According to another the particularly preferred design scheme for the steel workpiece for meeting the present invention, it is arranged on nucleus two sides
On marginal layer be respectively provided with less than steel workpiece overall thickness 10%, preferably smaller than 5% thickness.Up to the present people one
Directly think that relatively thick and soft superficial layer must be arranged for example to provide surface characteristic in hot rolling enough protections.But it can be with
See, with relatively thin marginal layer can process reliably reach and realize the band table of high quality by avoiding scale mark
Face.In addition, this also has such advantage, you can to obtain high near surface intensity simultaneously.The thickness of marginal layer is preferably respectively
Between 3% to the 5% of steel workpiece overall thickness or between 6% to 8%.It is 3% to 5% in thickness, it, can when especially about 4%
To reach the intensity of special near surface.Between thickness is 6% to 8%, when especially about 7%, fringe region is also correspondingly formed
It is wider, higher rolling degree and/or higher temperature thus may can be used during manufacturing.
According to another the preferred design scheme for the steel workpiece for meeting the present invention, the tensile strength R of the steel workpiecem
Generally greater than 700MPa, preferably greater than 800MPa are more preferably greater than 900MPa, especially preferred more than 1000MPa.It can see
It arrives, relatively high tensile strength can be successfully achieved by illustrated steel workpiece, without negatively damaging oxidation row
For.
In order to generally obtain the extra high tensile strength of steel workpiece, the tensile strength R of steel workpiece nucleusmGreatly
In 700MPa, preferably greater than 900MPa, especially preferred more than 1000MPa.It is possible thereby to it is corresponding implement softly surface region and
However still high tensile strength has been reached.
It is preferred that the tensile strength R in steel workpiece rim zonemLess than 500MPa, preferably smaller than 400MPa.When tension is strong
The scale mark of steel workpiece can particularly effectively be avoided in hot rolling by spending corresponding hour, thus reach high surface matter
Amount.
According to another the preferred design scheme for the steel workpiece for meeting the present invention, the yield limit R of steel workpiecep0.2
Generally greater than 650MPa, preferably greater than 700MPa, especially preferred more than 800MPa.By with relatively high yield limit
Steel workpiece can further improve the fatigue strength of thus manufactured component.
In order to obtain the generally high yield limit of steel workpiece, when the yield limit of the nucleus of the steel workpiece
Rp0.2It is particularly preferred when more than 700MPa, preferably greater than 800MPa, especially preferred more than 1000MPa.
In contrast, oxidation behavior as positive as possible during manufacturing in order to obtain, when the fringe region of the steel workpiece
Yield limit Rp0.2It is preferred when less than 400MPa, preferably smaller than 300MPa.
If according to another design scheme for the steel workpiece for meeting the present invention, the fracture elongation A in fringe region80
It is at least 15%, preferably at least 30%, then especially soft coating can be manufactured, it is particularly advantageous which realizes steel workpiece
Oxidation behavior.
In contrast, nucleus and/or steel workpiece fracture elongation A80Generally but preferably notable smaller, because
It is determined by harder nucleus by the fracture elongation.Such as nucleus and/or steel workpiece fracture elongation
A80It is as general as between 3.0% to 10%.
According to another design scheme for the steel workpiece for meeting the present invention, which is composite construction and core
Region and fringe region are formed by the composite layer of the composite construction, and wherein the composite construction is particularly by rolling covering next life
Production.Nucleus and fringe region can be realized in steel workpiece in a particularly simple way by composite construction.Here, respectively
The alloy compositions of a individual course can be adjusted accurately.Each individual layer of the composite construction can connecing by material mating
Close, especially thermal bonding and be connected to each other.Here, particularly by covering, especially rolling covering, particularly preferred hot rolling covering next life
Produce the composite construction.It is feasible in addition, each individual layer is produced in casting process as substituting.
According to another design scheme for the steel workpiece for meeting the present invention, nucleus is by higher-strength or superhigh intensity
Steel are constituted, and are especially made of Multiphase Steel, dual phase steel, martensitic phase steel, manganese boron steel or multi-phase Steels.These steel can have height
Intensity simultaneously assigns the component being made from it high fatigue strength.Multi-phase Steels in particular (can have the three-phase of nano-precipitation object by TPN steel
Steel).
Particularly advantageously by the weight % in nucleus in the following alloy compositions of unit in terms of high intensity
One or more generally limitations are as follows：
0.060≤C≤0.45；
0.050≤Si≤1.50；
1.0≤Mn≤3.0；
P≤0.020；
S≤0.03；
Al≤1.350；
Cr≤0.9；
Cu≤0.20；
Mo≤0.3；
N≤0.01；
Ni≤0.100；
Nb≤0.2；
Ti≤0.2；
V≤0.05；
B≤0.01；
As≤0.03；
Sn≤0.030；
Co≤0.010；
Ca≤0.005。
According to another design scheme for the steel workpiece for meeting the present invention, fringe region is by deep punching steel or higher-strength
Micro alloyed steel constitute.This steel can be set to it is sufficiently soft, it is possible thereby to effectively by the formation of scale mark minimize or
Person inhibits.
It is particularly advantageously unit by the weight % in fringe region in relation to avoiding scale mark aspect during manufacturing
The limitation of one or more of following alloy compositions is as follows：
C≤0.1；
Si≤0.5；
Mn≤1.0；
P≤0.03；
S≤0.02；
Al≤0.1；
Cr≤0.3；
Cu≤0.3；
Mo≤0.1；
N≤0.01；
Ni≤0.200；
Nb≤0.2；
Ti≤0.2；
B≤0.001；
Sn≤0.040。
According to another design scheme for the steel workpiece for meeting the present invention, nucleus and fringe region are integral type work
The region of part, wherein fringe region are formed particularly by annealing process.As by engaging separated workpiece or casting come shape
At the replacement of nucleus and fringe region, thus the steel workpiece can be produced in the form of unified piece and to core
The characteristic of heart district domain and/or fringe region is adjusted (such as annealing process by then carrying out).This annealing process example
Such as can be edge decarburization and/or diffusion annealing.The danger of each individual layer stripping can be especially reduced by this steel workpiece
Danger.
Second of introduction according to the present invention, the purpose being initially mentioned is also by steel workpiece according to the present invention for giving birth to
Produce vehicle chassis component, especially produce wheel, wheel stand, wheel bearing, wheel suspension, beam, (any kind of) axis, guide arm or
Part thereof of application solves.
The third introduction according to the present invention, the purpose being initially mentioned are made also by by steel workpiece according to the present invention
Vehicle chassis component, especially wheel, wheel stand, wheel bearing, wheel suspension, beam, (any kind of) axis, guide arm or one
Part solves.
Vehicle chassis component undergos especially high in use especially as the vehicle chassis component of the body quality without damping
Alternate stress.The chassis portion with extra high fatigue strength and surface quality can be manufactured by steel according to the present invention
Part, thus the alternate stress of surging can particularly good be undertaken by the vehicle chassis component in operation.
About other advantageous design schemes, the advantage with reference to the design scheme of steel workpiece according to the present invention and implementation
Form.
Description of the drawings
Next it is further illustrated the present invention in conjunction with diagram by means of embodiment.In figure：
Fig. 1 shows the embodiment of the steel workpiece according to the present invention in the form of composite construction.
Specific implementation mode
Fig. 1 illustrates the embodiment of the steel workpiece according to the present invention in the form of composite construction 1.The composite junction
The nucleus that structure 1 has the fringe region being made of two external edge edge layer 2 and is formed as core layer 3.Marginal layer 2 is distinguished
Thickness having less than the composite construction overall thickness 10%.
Next, providing core layer 3 and marginal layer 2 or entire composite junction to table 5 is exemplary in conjunction with the last table 1 of specification
The steel alloy composition of structure 1 and alloy compositions and its mechanical property that weight % is unit.
Table 1a shows three kinds of composition of alloy A1, A2, A3, A4, these compositions can be used for marginal layer 2.A1 and A2 points of alloy
Not Wei deep punching steel, and alloy A3 and A4 are higher-strength steel.The table gives each phases of each in alloy A1 to A4
Answer the alloy compositions of the enhancing intensity of minimum and maximum.Alloy A1 to A4 is selectively unit containing weight % defined below
It is one or more in alloy compositions：
P≤0.03；
S≤0.03；
Al≤0.2；
Cr≤0.3；
Cu≤0.3；
Mo≤0.1；
N≤0.01；
Ni≤0.5；
Nb≤0.1；
Ti≤0.2；
B≤0.01；
Sn≤0.02；
Ca≤0.01。
Table 1b shows the summation of the alloy compositions C, Si, Mn, Cr and N of alloy A1 to A4 respectively.Alloy A1 to A4 distinguishes
The summation of alloy compositions C, Si, Mn, Cr and N be respectively smaller than 1.45 weight %.Alloy A1 to A4 has relatively small tension
Intensity and yield limit, but there is relatively high (minimum) fracture elongation.
Table 2a shows seven kinds of composition of alloy K1, K2, K3, K4, K5, K6, K7, and it can be used to core layers 3.Alloy K1 is
Phase steels with nano-scaled precipitate, alloy K2 to K4 are Multiphase Steel or dual phase steel, and alloy K5 is martensitic phase steel, and alloy K6 is
Manganese boron steel and alloy K7 are multi-phase Steels.The table also gives each corresponding minimum and maximum of each in alloy K1 to K7
Enhancing intensity alloy compositions.Alloy K1 to K7 is selectively in the alloy compositions of unit containing weight % defined below
It is one or more：
P≤0.03；
S≤0.01；
Al≤1.5；
Cr≤1.0；
Cu≤0.2；
Mo≤0.3；
N≤0.01；
Ni≤0.3；
Nb≤0.1；
Ti≤0.2；
V≤0.1；
B≤0.01；
As≤0.02；
Sn≤0.05；
Co≤0.03；
Ca≤0.01。
Table 2b shows the summation of the alloy compositions C, Si, Mn, Cr and N of alloy K1 to K7 respectively.Alloy K1 to K7 distinguishes
The summation of alloy compositions C, Si, Mn, Cr and N be respectively greater than 1.45 weight %.Alloy K1 to K7 has relatively high tension strong
Degree and yield limit, but there is relatively low (minimum) fracture elongation.
Table 3 to 5 shows the different embodiments of the different composite structure 1 labeled as V1 to V5.Here, divide in structure row
Do not show which of alloy K1 to K7 is used for marginal layer 2 for which of core layer 3 and alloy A1 to A4.Additionally
Show that each layer accounts for the percentage of 1 overall thickness of composite construction.In the example V1 to V15 shown, the percentage of marginal layer 2 is thick
Degree is respectively 4% (V1, the V3) or 7% (V2, V4 to V15) of 1 overall thickness of composite construction.It has namely all selected respectively symmetrical
Layer structure.In the case, which is for example produced by the rolling covering of each individual layer 2,3.
In addition, generally giving the summation of 1 alloy compositions C, Si, Mn, Cr and N of composite construction.Finally, if can get
If, give the mechanical value of the corresponding composite construction 1 of embodiment V1 to V15, especially tensile strength, yield limit and (minimum)
Fracture elongation.
As can be seen, the summation of 1 alloy compositions C, Si, Mn, Cr and N of composite construction are generally respectively greater than 1.45 weights
Measure %.As can be seen that when following these conditions, high resist generally is respectively provided with according to the composite construction 1 of example V1 to V15
Tensile strength value and yield limit value, and the marginal layer 2 by being made of respectively one in alloy A1 to A4 has made soft cover
Layer.This realizes the manufacture for being avoided scale mark, but has wherein reached high near surface intensity simultaneously.In this way, this can be manufactured
The composite construction 1 of sample, can be manufactured using the composite construction especially has height tired in the case of the alternate stress of surging
The component of labor intensity.
It is equally applicable to for example integrally-formed steel previously with regard to the embodiment of the steel workpiece of 1 form of composite construction
Workpiece processed.Can the alloy changed on the thickness of steel workpiece for example be adjusted by subsequent heat treatment in this case
Composition.
Table 1a
Table 1b
Table 2a
Table 2b
Table 3
Table 4
Table 5.
Claims (16)
1. steel workpiece, the steel workpiece has
Fringe region (2) and
Nucleus (3),
The wherein described steel workpiece (1) forms softer than in its nucleus (3) in its fringe region (2), and
The summation of the alloy compositions C, Si, Mn, Cr and N of the steel workpiece (1) are generally larger than 1.45 weight %.
2. steel workpiece according to claim 1,
The summation of the alloy compositions C, Si, Mn, Cr and N of the wherein described steel workpiece (1) are generally less than 4.5 weight %.
3. steel workpiece according to claim 1 or 2,
Wherein the summation of alloy compositions C, Si, Mn, Cr and N in the fringe region (2) is more than 0.01 weight % and/or is less than
1.35 weight %.
4. steel workpiece as claimed in any of claims 1 to 3,
Wherein the summation of alloy compositions C, Si, Mn, Cr and N in the nucleus (3) is more than 1.7 weight % and/or is less than
4.8 weight %.
5. steel workpiece as claimed in any of claims 1 to 4,
The fringe region (2) of the wherein described steel workpiece (1) is by being arranged the marginal layer (2) on the nucleus (3) two sides
It constitutes.
6. steel workpiece according to claim 5,
Wherein the marginal layer (2) being arranged on the nucleus (3) two sides is built in terms of its thickness and/or composition
It is almost the same.
7. steel workpiece according to claim 5 or 6,
The marginal layer (2) being provided on the nucleus (3) two sides is respectively provided with less than the steel workpiece (1)
Overall thickness 10%, preferably smaller than 5% thickness.
8. steel workpiece as claimed in any of claims 1 to 7,
The tensile strength R of the wherein described steel workpiece (1)mGenerally greater than 700MPa, preferably greater than 800MPa are more preferably big
In 900MPa, especially preferred more than 1000MPa.
9. steel workpiece as claimed in any of claims 1 to 8,
The yield limit R of the wherein described steel workpiece (1)p0.2Generally greater than 650MPa, preferably greater than 700MPa, particularly preferably
More than 800MPa.
10. steel workpiece as claimed in any of claims 1 to 9,
Fracture elongation A in the wherein described fringe region (2)80It is at least 15%, preferably at least 30%.
11. steel workpiece as claimed in any of claims 1 to 10,
The wherein described steel workpiece (1) be composite construction (1), and nucleus (3) and fringe region (2) pass through it is described compound
The composite layer of structure (1) is formed, wherein the composite construction (1) is produced particularly by rolling covering.
12. the steel workpiece according to any one of claim 1 to 11,
The wherein described nucleus (3) is made of higher-strength or superhigh intensity steel, especially by Multiphase Steel, dual phase steel, geneva
Body phase steel, manganese boron steel or multi-phase Steels are constituted.
13. the steel workpiece according to any one of claim 1 to 12,
The wherein described fringe region (2) is made of the micro alloyed steel of deep punching steel or higher-strength.
14. the steel workpiece according to any one of claim 1 to 13,
The wherein described nucleus (3) and the region that the fringe region (2) is integral type workpiece, wherein the fringe region
(2) it is formed particularly by annealing process.
15. the application of the steel workpiece according to any one of claim 1 to 14, the application is for producing chassis portion
Part, especially produces wheel, wheel stand, wheel bearing, wheel suspension, beam, axis, a part for guide arm or these components.
16. vehicle chassis component, especially wheel, wheel stand, wheel bearing, wheel suspension, beam, axis, guide arm or these components
A part, the vehicle chassis component are produced by the steel workpiece (1) according to any one of claim 1 to 14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2015/072598 WO2017054862A1 (en) | 2015-09-30 | 2015-09-30 | Steel workpiece with improved surface quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108367380A true CN108367380A (en) | 2018-08-03 |
Family
ID=54252285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580083609.2A Pending CN108367380A (en) | 2015-09-30 | 2015-09-30 | Steel workpiece with improved surface quality |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20180272461A1 (en) |
| EP (1) | EP3356077B1 (en) |
| CN (1) | CN108367380A (en) |
| MX (1) | MX2018003984A (en) |
| WO (1) | WO2017054862A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017208251A1 (en) * | 2017-05-16 | 2018-11-22 | Thyssenkrupp Ag | Safety steel or wear-resistant steel and use |
| KR102098483B1 (en) * | 2018-07-27 | 2020-04-07 | 주식회사 포스코 | Low density steel clad sheet having excellent formability and fatigue property, and method for manufacturing the same |
| DE102019115165A1 (en) | 2019-06-05 | 2020-12-10 | Voestalpine Stahl Gmbh | Method for producing a steel composite material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102015423A (en) * | 2008-05-07 | 2011-04-13 | 蒂森克虏伯钢铁欧洲股份公司 | Use of a metal composite material in a vehicle structure |
| CN103168105A (en) * | 2010-10-11 | 2013-06-19 | 塔塔钢铁艾默伊登有限责任公司 | A steel strip composite and a method for making the same |
| DE102013017798A1 (en) * | 2013-10-25 | 2015-04-30 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Composite steel plate |
| EP2886332A1 (en) * | 2013-12-20 | 2015-06-24 | ThyssenKrupp Steel Europe AG | Flat steel product, steel part manufactured from such a flat steel product and body for a motor vehicle |
-
2015
- 2015-09-30 CN CN201580083609.2A patent/CN108367380A/en active Pending
- 2015-09-30 MX MX2018003984A patent/MX2018003984A/en unknown
- 2015-09-30 WO PCT/EP2015/072598 patent/WO2017054862A1/en active Application Filing
- 2015-09-30 EP EP15775163.7A patent/EP3356077B1/en active Active
- 2015-09-30 US US15/763,738 patent/US20180272461A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102015423A (en) * | 2008-05-07 | 2011-04-13 | 蒂森克虏伯钢铁欧洲股份公司 | Use of a metal composite material in a vehicle structure |
| CN103168105A (en) * | 2010-10-11 | 2013-06-19 | 塔塔钢铁艾默伊登有限责任公司 | A steel strip composite and a method for making the same |
| DE102013017798A1 (en) * | 2013-10-25 | 2015-04-30 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Composite steel plate |
| EP2886332A1 (en) * | 2013-12-20 | 2015-06-24 | ThyssenKrupp Steel Europe AG | Flat steel product, steel part manufactured from such a flat steel product and body for a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3356077A1 (en) | 2018-08-08 |
| US20180272461A1 (en) | 2018-09-27 |
| EP3356077B1 (en) | 2020-09-09 |
| WO2017054862A1 (en) | 2017-04-06 |
| MX2018003984A (en) | 2018-06-22 |
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